I can see it now, with their own dilapidated buildings, and human farms …

A bit dark perhaps? Rest assured somebody will mod it in, or perhaps you will create it!

As of now, I’d say not for the foreseeable future. There’s already the three kingdoms and the Dwarves as playable, with the Dwarves coming post-release, I would imagine then that if something like this was to be in the core game it wouldn’t be high on the list of features to get in there, and as such you would be waiting for a while!